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<pre><span class="sourceLineNo">001</span>/*-<a name="line.1"></a>
<span class="sourceLineNo">002</span> * Copyright (c) 2019 Diamond Light Source Ltd.<a name="line.2"></a>
<span class="sourceLineNo">003</span> *<a name="line.3"></a>
<span class="sourceLineNo">004</span> * All rights reserved. This program and the accompanying materials<a name="line.4"></a>
<span class="sourceLineNo">005</span> * are made available under the terms of the Eclipse Public License v1.0<a name="line.5"></a>
<span class="sourceLineNo">006</span> * which accompanies this distribution, and is available at<a name="line.6"></a>
<span class="sourceLineNo">007</span> * http://www.eclipse.org/legal/epl-v10.html<a name="line.7"></a>
<span class="sourceLineNo">008</span> */<a name="line.8"></a>
<span class="sourceLineNo">009</span><a name="line.9"></a>
<span class="sourceLineNo">010</span>package org.eclipse.january.dataset;<a name="line.10"></a>
<span class="sourceLineNo">011</span><a name="line.11"></a>
<span class="sourceLineNo">012</span>import java.lang.reflect.Array;<a name="line.12"></a>
<span class="sourceLineNo">013</span>import java.util.Date;<a name="line.13"></a>
<span class="sourceLineNo">014</span>import java.util.HashMap;<a name="line.14"></a>
<span class="sourceLineNo">015</span>import java.util.LinkedHashMap;<a name="line.15"></a>
<span class="sourceLineNo">016</span>import java.util.List;<a name="line.16"></a>
<span class="sourceLineNo">017</span>import java.util.Map;<a name="line.17"></a>
<span class="sourceLineNo">018</span>import java.util.Map.Entry;<a name="line.18"></a>
<span class="sourceLineNo">019</span><a name="line.19"></a>
<span class="sourceLineNo">020</span>import org.apache.commons.math3.complex.Complex;<a name="line.20"></a>
<span class="sourceLineNo">021</span><a name="line.21"></a>
<span class="sourceLineNo">022</span>/**<a name="line.22"></a>
<span class="sourceLineNo">023</span> * @since 2.3<a name="line.23"></a>
<span class="sourceLineNo">024</span> */<a name="line.24"></a>
<span class="sourceLineNo">025</span>public class InterfaceUtils {<a name="line.25"></a>
<span class="sourceLineNo">026</span>        private static final Map&lt;Class&lt;?&gt;, Class&lt;? extends Dataset&gt;&gt; class2Interface;<a name="line.26"></a>
<span class="sourceLineNo">027</span><a name="line.27"></a>
<span class="sourceLineNo">028</span>        private static final Map&lt;Class&lt;? extends Dataset&gt;, Class&lt;?&gt;&gt; interface2Class;<a name="line.28"></a>
<span class="sourceLineNo">029</span><a name="line.29"></a>
<span class="sourceLineNo">030</span>        private static final Map&lt;Class&lt;?&gt;, Integer&gt; elementBytes;<a name="line.30"></a>
<span class="sourceLineNo">031</span><a name="line.31"></a>
<span class="sourceLineNo">032</span>        private static final Map&lt;Class&lt;?&gt;, Class&lt;?&gt;&gt; bestFloatElement;<a name="line.32"></a>
<span class="sourceLineNo">033</span><a name="line.33"></a>
<span class="sourceLineNo">034</span>        private static final Map&lt;Class&lt;? extends Dataset&gt;, Class&lt;? extends CompoundDataset&gt;&gt; interface2Compound;<a name="line.34"></a>
<span class="sourceLineNo">035</span><a name="line.35"></a>
<span class="sourceLineNo">036</span>        private static final Map&lt;Class&lt;? extends CompoundDataset&gt;, Class&lt;? extends Dataset&gt;&gt; compound2Interface;<a name="line.36"></a>
<span class="sourceLineNo">037</span>        static {<a name="line.37"></a>
<span class="sourceLineNo">038</span>                class2Interface = createClassInterfaceMap();<a name="line.38"></a>
<span class="sourceLineNo">039</span><a name="line.39"></a>
<span class="sourceLineNo">040</span>                interface2Class = createInterfaceClassMap();<a name="line.40"></a>
<span class="sourceLineNo">041</span><a name="line.41"></a>
<span class="sourceLineNo">042</span>                elementBytes = createElementBytesMap();<a name="line.42"></a>
<span class="sourceLineNo">043</span><a name="line.43"></a>
<span class="sourceLineNo">044</span>                bestFloatElement = createBestFloatElementMap();<a name="line.44"></a>
<span class="sourceLineNo">045</span><a name="line.45"></a>
<span class="sourceLineNo">046</span>                interface2Compound = createInterfaceCompoundMap();<a name="line.46"></a>
<span class="sourceLineNo">047</span>                compound2Interface = new HashMap&lt;Class&lt;? extends CompoundDataset&gt;, Class&lt;? extends Dataset&gt;&gt;();<a name="line.47"></a>
<span class="sourceLineNo">048</span>                for (Entry&lt;Class&lt;? extends Dataset&gt;, Class&lt;? extends CompoundDataset&gt;&gt; e : interface2Compound.entrySet()) {<a name="line.48"></a>
<span class="sourceLineNo">049</span>                        compound2Interface.put(e.getValue(), e.getKey());<a name="line.49"></a>
<span class="sourceLineNo">050</span>                }<a name="line.50"></a>
<span class="sourceLineNo">051</span>        }<a name="line.51"></a>
<span class="sourceLineNo">052</span><a name="line.52"></a>
<span class="sourceLineNo">053</span>        private static Map&lt;Class&lt;?&gt;, Class&lt;? extends Dataset&gt;&gt; createClassInterfaceMap() {<a name="line.53"></a>
<span class="sourceLineNo">054</span>                Map&lt;Class&lt;?&gt;, Class&lt;? extends Dataset&gt;&gt; result = new HashMap&lt;&gt;();<a name="line.54"></a>
<span class="sourceLineNo">055</span>                result.put(Boolean.class, BooleanDataset.class);<a name="line.55"></a>
<span class="sourceLineNo">056</span>                result.put(Byte.class, ByteDataset.class);<a name="line.56"></a>
<span class="sourceLineNo">057</span>                result.put(Short.class, ShortDataset.class);<a name="line.57"></a>
<span class="sourceLineNo">058</span>                result.put(Integer.class, IntegerDataset.class);<a name="line.58"></a>
<span class="sourceLineNo">059</span>                result.put(Long.class, LongDataset.class);<a name="line.59"></a>
<span class="sourceLineNo">060</span>                result.put(Float.class, FloatDataset.class);<a name="line.60"></a>
<span class="sourceLineNo">061</span>                result.put(Double.class, DoubleDataset.class);<a name="line.61"></a>
<span class="sourceLineNo">062</span>                result.put(boolean.class, BooleanDataset.class);<a name="line.62"></a>
<span class="sourceLineNo">063</span>                result.put(byte.class, ByteDataset.class);<a name="line.63"></a>
<span class="sourceLineNo">064</span>                result.put(short.class, ShortDataset.class);<a name="line.64"></a>
<span class="sourceLineNo">065</span>                result.put(int.class, IntegerDataset.class);<a name="line.65"></a>
<span class="sourceLineNo">066</span>                result.put(long.class, LongDataset.class);<a name="line.66"></a>
<span class="sourceLineNo">067</span>                result.put(float.class, FloatDataset.class);<a name="line.67"></a>
<span class="sourceLineNo">068</span>                result.put(double.class, DoubleDataset.class);<a name="line.68"></a>
<span class="sourceLineNo">069</span>                result.put(Complex.class, ComplexDoubleDataset.class);<a name="line.69"></a>
<span class="sourceLineNo">070</span>                result.put(String.class, StringDataset.class);<a name="line.70"></a>
<span class="sourceLineNo">071</span>                result.put(Date.class, DateDataset.class);<a name="line.71"></a>
<span class="sourceLineNo">072</span>                return result;<a name="line.72"></a>
<span class="sourceLineNo">073</span>        }<a name="line.73"></a>
<span class="sourceLineNo">074</span><a name="line.74"></a>
<span class="sourceLineNo">075</span>        private static Map&lt;Class&lt;? extends Dataset&gt;, Class&lt;?&gt;&gt; createInterfaceClassMap() {<a name="line.75"></a>
<span class="sourceLineNo">076</span>                Map&lt;Class&lt;? extends Dataset&gt;, Class&lt;?&gt;&gt; result = new HashMap&lt;&gt;();<a name="line.76"></a>
<span class="sourceLineNo">077</span>                result.put(BooleanDataset.class, Boolean.class);<a name="line.77"></a>
<span class="sourceLineNo">078</span>                result.put(ByteDataset.class, Byte.class);<a name="line.78"></a>
<span class="sourceLineNo">079</span>                result.put(ShortDataset.class, Short.class);<a name="line.79"></a>
<span class="sourceLineNo">080</span>                result.put(IntegerDataset.class, Integer.class);<a name="line.80"></a>
<span class="sourceLineNo">081</span>                result.put(LongDataset.class, Long.class);<a name="line.81"></a>
<span class="sourceLineNo">082</span>                result.put(FloatDataset.class, Float.class);<a name="line.82"></a>
<span class="sourceLineNo">083</span>                result.put(DoubleDataset.class, Double.class);<a name="line.83"></a>
<span class="sourceLineNo">084</span>                result.put(CompoundByteDataset.class, Byte.class);<a name="line.84"></a>
<span class="sourceLineNo">085</span>                result.put(CompoundShortDataset.class, Short.class);<a name="line.85"></a>
<span class="sourceLineNo">086</span>                result.put(CompoundIntegerDataset.class, Integer.class);<a name="line.86"></a>
<span class="sourceLineNo">087</span>                result.put(CompoundLongDataset.class, Long.class);<a name="line.87"></a>
<span class="sourceLineNo">088</span>                result.put(CompoundFloatDataset.class, Float.class);<a name="line.88"></a>
<span class="sourceLineNo">089</span>                result.put(CompoundDoubleDataset.class, Double.class);<a name="line.89"></a>
<span class="sourceLineNo">090</span>                result.put(ComplexFloatDataset.class, Float.class);<a name="line.90"></a>
<span class="sourceLineNo">091</span>                result.put(ComplexDoubleDataset.class, Double.class);<a name="line.91"></a>
<span class="sourceLineNo">092</span>                result.put(RGBDataset.class, Short.class);<a name="line.92"></a>
<span class="sourceLineNo">093</span>                result.put(StringDataset.class, String.class);<a name="line.93"></a>
<span class="sourceLineNo">094</span>                result.put(DateDataset.class, Date.class);<a name="line.94"></a>
<span class="sourceLineNo">095</span>                result.put(ObjectDataset.class, Object.class);<a name="line.95"></a>
<span class="sourceLineNo">096</span>                return result;<a name="line.96"></a>
<span class="sourceLineNo">097</span>        }<a name="line.97"></a>
<span class="sourceLineNo">098</span><a name="line.98"></a>
<span class="sourceLineNo">099</span>        private static Map&lt;Class&lt;?&gt;, Integer&gt; createElementBytesMap() {<a name="line.99"></a>
<span class="sourceLineNo">100</span>                Map&lt;Class&lt;?&gt;, Integer&gt; result = new LinkedHashMap&lt;&gt;();<a name="line.100"></a>
<span class="sourceLineNo">101</span>                result.put(Boolean.class, 1);<a name="line.101"></a>
<span class="sourceLineNo">102</span>                result.put(Byte.class, Byte.SIZE / 8);<a name="line.102"></a>
<span class="sourceLineNo">103</span>                result.put(Short.class, Short.SIZE / 8);<a name="line.103"></a>
<span class="sourceLineNo">104</span>                result.put(Integer.class, Integer.SIZE / 8);<a name="line.104"></a>
<span class="sourceLineNo">105</span>                result.put(Long.class, Long.SIZE / 8);<a name="line.105"></a>
<span class="sourceLineNo">106</span>                result.put(Float.class, Float.SIZE / 8);<a name="line.106"></a>
<span class="sourceLineNo">107</span>                result.put(Double.class, Double.SIZE / 8);<a name="line.107"></a>
<span class="sourceLineNo">108</span>                result.put(String.class, 1);<a name="line.108"></a>
<span class="sourceLineNo">109</span>                result.put(Object.class, 1);<a name="line.109"></a>
<span class="sourceLineNo">110</span>                result.put(Date.class, 1);<a name="line.110"></a>
<span class="sourceLineNo">111</span>                return result;<a name="line.111"></a>
<span class="sourceLineNo">112</span>        }<a name="line.112"></a>
<span class="sourceLineNo">113</span><a name="line.113"></a>
<span class="sourceLineNo">114</span>        private static Map&lt;Class&lt;?&gt;, Class&lt;?&gt;&gt; createBestFloatElementMap() {<a name="line.114"></a>
<span class="sourceLineNo">115</span>                Map&lt;Class&lt;?&gt;, Class&lt;?&gt;&gt; result = new HashMap&lt;&gt;();<a name="line.115"></a>
<span class="sourceLineNo">116</span>                result.put(Boolean.class, Float.class);<a name="line.116"></a>
<span class="sourceLineNo">117</span>                result.put(Byte.class, Float.class);<a name="line.117"></a>
<span class="sourceLineNo">118</span>                result.put(Short.class, Float.class);<a name="line.118"></a>
<span class="sourceLineNo">119</span>                result.put(Integer.class, Double.class);<a name="line.119"></a>
<span class="sourceLineNo">120</span>                result.put(Long.class, Double.class);<a name="line.120"></a>
<span class="sourceLineNo">121</span>                result.put(Float.class, Float.class);<a name="line.121"></a>
<span class="sourceLineNo">122</span>                result.put(Double.class, Double.class);<a name="line.122"></a>
<span class="sourceLineNo">123</span>                return result;<a name="line.123"></a>
<span class="sourceLineNo">124</span>        }<a name="line.124"></a>
<span class="sourceLineNo">125</span><a name="line.125"></a>
<span class="sourceLineNo">126</span>        private static Map&lt;Class&lt;? extends Dataset&gt;, Class&lt;? extends CompoundDataset&gt;&gt; createInterfaceCompoundMap() {<a name="line.126"></a>
<span class="sourceLineNo">127</span>                Map&lt;Class&lt;? extends Dataset&gt;, Class&lt;? extends CompoundDataset&gt;&gt; result = new HashMap&lt;&gt;();<a name="line.127"></a>
<span class="sourceLineNo">128</span>                result.put(ByteDataset.class, CompoundByteDataset.class);<a name="line.128"></a>
<span class="sourceLineNo">129</span>                result.put(ShortDataset.class, CompoundShortDataset.class);<a name="line.129"></a>
<span class="sourceLineNo">130</span>                result.put(IntegerDataset.class, CompoundIntegerDataset.class);<a name="line.130"></a>
<span class="sourceLineNo">131</span>                result.put(LongDataset.class, CompoundLongDataset.class);<a name="line.131"></a>
<span class="sourceLineNo">132</span>                result.put(FloatDataset.class, CompoundFloatDataset.class);<a name="line.132"></a>
<span class="sourceLineNo">133</span>                result.put(DoubleDataset.class, CompoundDoubleDataset.class);<a name="line.133"></a>
<span class="sourceLineNo">134</span>                return result;<a name="line.134"></a>
<span class="sourceLineNo">135</span>        }<a name="line.135"></a>
<span class="sourceLineNo">136</span><a name="line.136"></a>
<span class="sourceLineNo">137</span>        /**<a name="line.137"></a>
<span class="sourceLineNo">138</span>         * @param clazz<a name="line.138"></a>
<span class="sourceLineNo">139</span>         * @return true if supported as an element class (note, Object is not supported)<a name="line.139"></a>
<span class="sourceLineNo">140</span>         */<a name="line.140"></a>
<span class="sourceLineNo">141</span>        public static boolean isElementSupported(Class&lt;? extends Object&gt; clazz) {<a name="line.141"></a>
<span class="sourceLineNo">142</span>                return class2Interface.containsKey(clazz);<a name="line.142"></a>
<span class="sourceLineNo">143</span>        }<a name="line.143"></a>
<span class="sourceLineNo">144</span><a name="line.144"></a>
<span class="sourceLineNo">145</span>        /**<a name="line.145"></a>
<span class="sourceLineNo">146</span>         * @param clazz dataset class<a name="line.146"></a>
<span class="sourceLineNo">147</span>         * @return (boxed) class of constituent element<a name="line.147"></a>
<span class="sourceLineNo">148</span>         */<a name="line.148"></a>
<span class="sourceLineNo">149</span>        public static Class&lt;?&gt; getElementClass(final Class&lt;? extends Dataset&gt; clazz) {<a name="line.149"></a>
<span class="sourceLineNo">150</span>                return interface2Class.get(clazz);<a name="line.150"></a>
<span class="sourceLineNo">151</span>        }<a name="line.151"></a>
<span class="sourceLineNo">152</span><a name="line.152"></a>
<span class="sourceLineNo">153</span>        /**<a name="line.153"></a>
<span class="sourceLineNo">154</span>         * Get dataset interface from an object. The following are supported: Java Number objects, Apache common math Complex<a name="line.154"></a>
<span class="sourceLineNo">155</span>         * objects, Java arrays and lists<a name="line.155"></a>
<span class="sourceLineNo">156</span>         *<a name="line.156"></a>
<span class="sourceLineNo">157</span>         * @param obj<a name="line.157"></a>
<span class="sourceLineNo">158</span>         * @return dataset interface <a name="line.158"></a>
<span class="sourceLineNo">159</span>         */<a name="line.159"></a>
<span class="sourceLineNo">160</span>        public static Class &lt;? extends Dataset&gt; getInterface(Object obj) {<a name="line.160"></a>
<span class="sourceLineNo">161</span>                Class&lt;? extends Dataset&gt; dc = null;<a name="line.161"></a>
<span class="sourceLineNo">162</span><a name="line.162"></a>
<span class="sourceLineNo">163</span>                if (obj == null) {<a name="line.163"></a>
<span class="sourceLineNo">164</span>                        return ObjectDataset.class;<a name="line.164"></a>
<span class="sourceLineNo">165</span>                }<a name="line.165"></a>
<span class="sourceLineNo">166</span><a name="line.166"></a>
<span class="sourceLineNo">167</span>                if (obj instanceof List&lt;?&gt;) {<a name="line.167"></a>
<span class="sourceLineNo">168</span>                        List&lt;?&gt; jl = (List&lt;?&gt;) obj;<a name="line.168"></a>
<span class="sourceLineNo">169</span>                        int l = jl.size();<a name="line.169"></a>
<span class="sourceLineNo">170</span>                        for (int i = 0; i &lt; l; i++) {<a name="line.170"></a>
<span class="sourceLineNo">171</span>                                Class&lt;? extends Dataset&gt; lc = getInterface(jl.get(i));<a name="line.171"></a>
<span class="sourceLineNo">172</span>                                if (isBetter(lc, dc)) {<a name="line.172"></a>
<span class="sourceLineNo">173</span>                                        dc = lc;<a name="line.173"></a>
<span class="sourceLineNo">174</span>                                }<a name="line.174"></a>
<span class="sourceLineNo">175</span>                        }<a name="line.175"></a>
<span class="sourceLineNo">176</span>                } else if (obj.getClass().isArray()) {<a name="line.176"></a>
<span class="sourceLineNo">177</span>                        Class&lt;?&gt; ca = obj.getClass().getComponentType();<a name="line.177"></a>
<span class="sourceLineNo">178</span>                        if (isElementSupported(ca)) {<a name="line.178"></a>
<span class="sourceLineNo">179</span>                                return class2Interface.get(ca);<a name="line.179"></a>
<span class="sourceLineNo">180</span>                        }<a name="line.180"></a>
<span class="sourceLineNo">181</span>                        int l = Array.getLength(obj);<a name="line.181"></a>
<span class="sourceLineNo">182</span>                        for (int i = 0; i &lt; l; i++) {<a name="line.182"></a>
<span class="sourceLineNo">183</span>                                Object lo = Array.get(obj, i);<a name="line.183"></a>
<span class="sourceLineNo">184</span>                                Class&lt;? extends Dataset&gt; lc = getInterface(lo);<a name="line.184"></a>
<span class="sourceLineNo">185</span>                                if (isBetter(lc, dc)) {<a name="line.185"></a>
<span class="sourceLineNo">186</span>                                        dc = lc;<a name="line.186"></a>
<span class="sourceLineNo">187</span>                                }<a name="line.187"></a>
<span class="sourceLineNo">188</span>                        }<a name="line.188"></a>
<span class="sourceLineNo">189</span>                } else if (obj instanceof Dataset) {<a name="line.189"></a>
<span class="sourceLineNo">190</span>                        return ((Dataset) obj).getClass();<a name="line.190"></a>
<span class="sourceLineNo">191</span>                } else if (obj instanceof ILazyDataset) {<a name="line.191"></a>
<span class="sourceLineNo">192</span>                        dc = getInterfaceFromClass(((ILazyDataset) obj).getElementsPerItem(), ((ILazyDataset) obj).getElementClass());<a name="line.192"></a>
<span class="sourceLineNo">193</span>                } else {<a name="line.193"></a>
<span class="sourceLineNo">194</span>                        Class&lt;?&gt; ca = obj.getClass();<a name="line.194"></a>
<span class="sourceLineNo">195</span>                        if (isElementSupported(ca)) {<a name="line.195"></a>
<span class="sourceLineNo">196</span>                                return class2Interface.get(ca);<a name="line.196"></a>
<span class="sourceLineNo">197</span>                        }<a name="line.197"></a>
<span class="sourceLineNo">198</span>                }<a name="line.198"></a>
<span class="sourceLineNo">199</span>                return dc;<a name="line.199"></a>
<span class="sourceLineNo">200</span>        }<a name="line.200"></a>
<span class="sourceLineNo">201</span><a name="line.201"></a>
<span class="sourceLineNo">202</span>        /**<a name="line.202"></a>
<span class="sourceLineNo">203</span>         * @param elementsPerItem<a name="line.203"></a>
<span class="sourceLineNo">204</span>         * @param elementClass<a name="line.204"></a>
<span class="sourceLineNo">205</span>         * @return dataset interface <a name="line.205"></a>
<span class="sourceLineNo">206</span>         */<a name="line.206"></a>
<span class="sourceLineNo">207</span>        public static Class&lt;? extends Dataset&gt; getInterfaceFromClass(int elementsPerItem, Class&lt;?&gt; elementClass) {<a name="line.207"></a>
<span class="sourceLineNo">208</span>                Class&lt;? extends Dataset&gt; clazz = class2Interface.get(elementClass);<a name="line.208"></a>
<span class="sourceLineNo">209</span>                if (clazz == null) {<a name="line.209"></a>
<span class="sourceLineNo">210</span>                        throw new IllegalArgumentException("Class of object not supported");<a name="line.210"></a>
<span class="sourceLineNo">211</span>                }<a name="line.211"></a>
<span class="sourceLineNo">212</span>                if (elementsPerItem &gt; 1 &amp;&amp; interface2Compound.containsKey(clazz)) {<a name="line.212"></a>
<span class="sourceLineNo">213</span>                        clazz = interface2Compound.get(clazz);<a name="line.213"></a>
<span class="sourceLineNo">214</span>                }<a name="line.214"></a>
<span class="sourceLineNo">215</span>                return clazz;<a name="line.215"></a>
<span class="sourceLineNo">216</span>        }<a name="line.216"></a>
<span class="sourceLineNo">217</span><a name="line.217"></a>
<span class="sourceLineNo">218</span>        /**<a name="line.218"></a>
<span class="sourceLineNo">219</span>         * @param clazz dataset interface<a name="line.219"></a>
<span class="sourceLineNo">220</span>         * @return elemental dataset interface available for given dataset interface<a name="line.220"></a>
<span class="sourceLineNo">221</span>         */<a name="line.221"></a>
<span class="sourceLineNo">222</span>        public static Class&lt;? extends Dataset&gt; getElementalInterface(final Class&lt;? extends Dataset&gt; clazz) {<a name="line.222"></a>
<span class="sourceLineNo">223</span>                return isElemental(clazz) ? clazz : compound2Interface.get(clazz);<a name="line.223"></a>
<span class="sourceLineNo">224</span>        }<a name="line.224"></a>
<span class="sourceLineNo">225</span><a name="line.225"></a>
<span class="sourceLineNo">226</span>        /**<a name="line.226"></a>
<span class="sourceLineNo">227</span>         * @param a dataset<a name="line.227"></a>
<span class="sourceLineNo">228</span>         * @return true if dataset is not compound or complex<a name="line.228"></a>
<span class="sourceLineNo">229</span>         */<a name="line.229"></a>
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<span class="sourceLineNo">293</span>         * @param clazz<a name="line.293"></a>
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<span class="sourceLineNo">325</span>        /**<a name="line.325"></a>
<span class="sourceLineNo">326</span>         * Find dataset interface that best fits given classes. The best class takes into account complex and array datasets<a name="line.326"></a>
<span class="sourceLineNo">327</span>         *<a name="line.327"></a>
<span class="sourceLineNo">328</span>         * @param a<a name="line.328"></a>
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<span class="sourceLineNo">368</span>                Class&lt;? extends Dataset&gt; c = isBetter(interface2Class.get(a), interface2Class.get(b)) ? a : b;<a name="line.368"></a>
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<span class="sourceLineNo">388</span>        /**<a name="line.388"></a>
<span class="sourceLineNo">389</span>         * The largest dataset type suitable for a summation of around a few thousand items without changing from the "kind"<a name="line.389"></a>
<span class="sourceLineNo">390</span>         * of dataset<a name="line.390"></a>
<span class="sourceLineNo">391</span>         *<a name="line.391"></a>
<span class="sourceLineNo">392</span>         * @param otype<a name="line.392"></a>
<span class="sourceLineNo">393</span>         * @return largest dataset type available for given dataset type<a name="line.393"></a>
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<span class="sourceLineNo">414</span>        /**<a name="line.414"></a>
<span class="sourceLineNo">415</span>         * Find floating point dataset interface that best fits given types. The best type takes into account complex and array<a name="line.415"></a>
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<span class="sourceLineNo">419</span>         *            old dataset class<a name="line.419"></a>
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<span class="sourceLineNo">475</span>        /**<a name="line.475"></a>
<span class="sourceLineNo">476</span>         * Convert double to number<a name="line.476"></a>
<span class="sourceLineNo">477</span>         * @param clazz dataset interface<a name="line.477"></a>
<span class="sourceLineNo">478</span>         * @param x<a name="line.478"></a>
<span class="sourceLineNo">479</span>         * @return biggest number if integer. Return null if not interface is not numerical<a name="line.479"></a>
<span class="sourceLineNo">480</span>         */<a name="line.480"></a>
<span class="sourceLineNo">481</span>        public static Number fromDoubleToBiggestNumber(Class&lt;? extends Dataset&gt; clazz, double x) {<a name="line.481"></a>
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<span class="sourceLineNo">492</span>                return null;<a name="line.492"></a>
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<span class="sourceLineNo">494</span><a name="line.494"></a>
<span class="sourceLineNo">495</span>        /**<a name="line.495"></a>
<span class="sourceLineNo">496</span>         * @param clazz dataset interface<a name="line.496"></a>
<span class="sourceLineNo">497</span>         * @param x<a name="line.497"></a>
<span class="sourceLineNo">498</span>         * @return biggest native primitive if integer<a name="line.498"></a>
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<span class="sourceLineNo">501</span>        public static Number toBiggestNumber(Class&lt;? extends Dataset&gt; clazz, Number x) {<a name="line.501"></a>
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<span class="sourceLineNo">512</span>                return null;<a name="line.512"></a>
<span class="sourceLineNo">513</span>        }<a name="line.513"></a>
<span class="sourceLineNo">514</span>}<a name="line.514"></a>




























































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